I ran on the dirt on the side of the road because it’s softer than the road. It’s softer, but less even. It’s much easier to run faster on a perfectly flat surface but it seems less real. Calm waters exist in ponds and lakes but if you want to go far, then you’ll have to deal with waves and storms, or mountains and valleys.
Maybe you can run fast. Just make sure you practice running on all the surfaces. Because one day you’ll meet them.